LM25115A - 具有上电/断电跟踪功能的 42V、次级侧后置稳压器/同步降压控制器

LM25115A是TI德州仪器公司的一款PWM与谐振控制器产品，LM25115A是具有上电/断电跟踪功能的 42V、次级侧后置稳压器/同步降压控制器，本站介绍了LM25115A的封装应用图解、特点和优点、功能等，并给出了与LM25115A相关的TI元器件型号供参考。

LM25115A - 具有上电/断电跟踪功能的 42V、次级侧后置稳压器/同步降压控制器 - PWM与谐振控制器 - 离线隔离型DC/DC控制器和转换器 - 德州仪器

产品描述

The LM25115A controller contains all of the features necessary to produce multiple tracking outputs using the Secondary Side Post Regulation (SSPR) technique. The SSPR technique develops a highly efficient and well regulated auxiliary output from the secondary side switching waveform of an isolated power converter. LM25115A can be also used as a standalone DC/DC synchronous buck controller (Refer to section). Regulation of the auxiliary output voltage is achieved by leading edge pulse width modulation (PWM) of the main channel duty cycle. Leading edge modulation is compatible with either current mode or voltage mode control of the main output. The LM25115A drives external high-side and low-side NMOS power switches configured as a synchronous buck regulator. A current sense amplifier provides overload protection and operates over a wide common mode input range. Additional features include a low dropout (LDO) bias regulator, error amplifier, precision reference, adaptive dead time control of the gate signals and thermal shutdown.

产品特性

Power-up/Power-down Tracking
Self-synchronization to Main Channel Output
Leading Edge Pulse Width Modulation
Valley Current Mode Control
Standalone DC/DC Synchronous Buck Mode
Operates from AC or DC Input up to 42V
Wide 4.5V to 30V Bias Supply Range
Wide 0.75V to 13.5V Output Range.
Top and Bottom Gate Drivers Sink 2.5A Peak
Adaptive Gate Driver Dead-time Control
Wide Bandwidth Error Amplifier (4MHz)
Programmable Soft-start
Thermal Shutdown Protection
TSSOP-16 package

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